Claude Opus 4.1 vs GPT OSS 20B High Comparison

Comparing Claude Opus 4.1 and GPT OSS 20B High across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Opus 4.1 outperforms in 1 benchmarks (GPQA), while GPT OSS 20B High is better at 1 benchmark (AIME 2025).

Both models are evenly matched across the benchmarks.

Sat Mar 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT OSS 20B High costs less

For input processing, Claude Opus 4.1 ($15.00/1M tokens) is 150.0x more expensive than GPT OSS 20B High ($0.10/1M tokens).

For output processing, Claude Opus 4.1 ($75.00/1M tokens) is 150.0x more expensive than GPT OSS 20B High ($0.50/1M tokens).

In conclusion, Claude Opus 4.1 is more expensive than GPT OSS 20B High.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude Opus 4.1

Input tokens$15.00

Output tokens$75.00

Best providerAnthropic

GPT OSS 20B High

Input tokens$0.10

Output tokens$0.50

Best providerOpenAI

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Context Window

Maximum input and output token capacity

Claude Opus 4.1 accepts 200,000 input tokens compared to GPT OSS 20B High's 131,072 tokens. GPT OSS 20B High can generate longer responses up to 131,072 tokens, while Claude Opus 4.1 is limited to 32,000 tokens.

Claude Opus 4.1

Input200,000 tokens

Output32,000 tokens

GPT OSS 20B High

Input131,072 tokens

Output131,072 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.1 supports multimodal inputs, whereas GPT OSS 20B High does not.

Claude Opus 4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.1

Text

Images

Audio

Video

GPT OSS 20B High

Text

Images

Audio

Video

License

Usage and distribution terms

Claude Opus 4.1 is licensed under a proprietary license, while GPT OSS 20B High uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Opus 4.1

Proprietary

Closed source

GPT OSS 20B High

Apache 2.0

Open weights

Release Timeline

When each model was launched

Both models were released on 2025-08-05.

They likely represent similar generations of model development.

Claude Opus 4.1

Aug 5, 2025

7 months ago

GPT OSS 20B High

Aug 5, 2025

7 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Opus 4.1 is available from Anthropic, Bedrock, Google. GPT OSS 20B High is available from OpenAI. The availability of providers can affect quality of the model and reliability.